Continuity mistake: As Zach is 'raising his goblet of rock', his hand gets a lot lower in a shot change. (00:40:10)
School of Rock (2003)
Plot summary
Directed by: Richard Linklater
Starring: Jack Black, Joan Cusack, Mike White, Adam Pascal
Dewey is going to be evicted from his apartment by his roommate (a substitute teacher) if he doesn't come up with some money. He gets a call from a school principal and pretends to be his roommate and teaches the fifth grade kids how to play rock so he can win the Battle of the Bands and get $2000.
Keylime
More mistakes in School of Rock
Ms. Mullins: I've just been informed that all of your children are missing.
Trivia: Miranda Cosgrove, who plays Summer Hathaway, actually has a good voice and plays guitar. She had to take a 45-minute class to learn how to sing badly for the scene where she sang "Memories."
More questions & answers from School of Rock
Answer: It is never said but If I was to guess, they got it from the guy he was pretending to be (Ned's) information from the school office.